According to Datta, parosmia could resolve over time as the regrown sensory neurons go through a process of "refinement. Will sense of smell and taste ever return normally for these patients?įor most people, loss of smell and taste is temporary, but there are people where it's unclear at this stage whether their senses will go back to normal. A complete loss of smell (anosmia) or loss of taste (ageusia) is rare. Losing taste and smell can be an early symptom of a COVID-19 infection. When you lose your sense of smell due to age, a health problem or a medicine foods can seem tasteless or bland. Right now, it's not known why some patients' senses return normally and others' don't. Your sense of taste and smell work together to help you enjoy foods and drinks. He added that for taste, it seems like both support cells and actual taste cells "might be infectible" by the coronavirus, and the underlying mechanism behind taste alterations has "similarities" to smell. and one possibility is that in people with COVID, that might actually take extra long."Īs a result, the parosmia may arise when those sensory neurons are "reborn" and have to reintegrate into the body's olfactory system all over again, Datta said. "The sensory neurons have to be regenerated. "We think that in the people who have longer lasting anosmia, maybe the long-term lack of support from these (support) cells actually causes the sensory neurons to die," he explained.
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